Larry the Cat, the Chief __ to the Cabinet Office
This page is the CodyCross answer for the clue below from Inside the Spaceship, Group 1199, Puzzle 5 (Safe Travels).
Question is: Larry the Cat, the Chief __ to the Cabinet Office
and the answer is: MOUSER
Word Meaning:
MOUSER — A cat that catches mice, kept specifically for the purpose. [from 15th c.]
Definitions from Wiktionary.